论文标题
瞬时极速和全球模型
Instantaneous Pole Velocity and Global Models
论文作者
论文摘要
考虑了一种估计极速移动速度的新方法。该方法使用（矢量）水平分量\ textbf {h}在给定年份中使用模型计算的空间分布及其相对于最近的时代的变化。速度方程是从pole $ \ mathbf {h}（λ（t），ϕ（t），t），t）= 0 $的时间依赖的表达式获得的。这里$λ（t）$和$ ϕ（t）$是pole $ t $的地理坐标。可以使用HERMITE样条发现时代之间的速度，该速度具有光滑的线，可在每个时期内保持速度向量。我们使用IGRF和COV-OBSX2模型来找到水平分量。
A new approach to estimating the velocity of the pole moving is considered. The method uses the model-calculated spatial distribution of the (vector) horizontal component \textbf{H} for a given year and its change relative to the closest epochs. The velocity equation is obtained from the expression for the time dependence of the position of the pole $\mathbf{H}(λ(t),ϕ(t),t)=0$. Here $λ(t)$ and $ϕ(t)$ are the geographic coordinates of the pole at time $t$. The velocity between epochs can be found using the Hermite spline, which gives a smooth line that keeps the velocity vector in each epoch. We use IGRF and COV-OBSx2 models to find the horizontal component.
